Taxation - Withholding income tax (Details)	12 Months Ended
Dec. 31, 2025
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest [Abstract]
Withholding income tax on dividends distributed by subsidiaries to its immediate holding entity outside china (as a percent)	10.00%
Maximum percentage of withholding income tax on dividends distributed by subsidiaries to its immediate holding entity in Hong Kong	5.00%
Percentage of ownership interests held by foreign investors	25.00%

The minimum direct ownership percentage in the foreign invested entities owned by the foreign investor, determining whether the lower withholding income tax rate can be applied for dividends distributed by the foreign invested entity to its immediate holding entity in Hong Kong.

No definition available.

Name:	zh_Percentagedirectlyownedbyforeigninvestorforlowerwithholdingincometaxrateminimum
Namespace Prefix:	zh_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration